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Bore Adapter, 3/8 Inch Bore Diameter fits 17mm Bearing
Bore Adapter, 3/8 Inch Bore Diameter fits 17mm Bearing is backordered and will ship as soon as it is back in stock.
1-Year Warranty
1-Year Warranty
- Returns are accepted within 30 days of the original shipping date.
- 1-Year Warranty on all products.
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Free Shipping
Free 3-5 Day Standard Domestic Shipping
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Compatible Makes or BrandsFerris
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Outside Diameter
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Inside Diameter
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Material
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Fits With Bearing
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Shoulder Length
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Backside Offset
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Frontside Offset
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Inside Diameter Exact
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Through Bore

Back Side Offset: The width from the center of the pulley to the backside edge of the hub or bore adapter.
Fits with Bearing: The size of the bearing the bore adapter is designed to fit into. Phoenix bore adapters are available for 5/8" and 17mm bearings.
Frontside Offset: The width from the center of the product to the front edge of the hub, bearing, or bore adapter.
Inside Diameter: The distance across the center hole, or bore, of the product. This dimension should match the diameter of your shaft or bolt.
Material: Describes what the product is made from. Plastic, aluminum, and diecast are softer, lighter, and do not rust. Steel and cast iron are meant for heavy-duty applications, but can rust in certain circumstances.
Outside Diameter: The distance across the circle of the product, from outside edge to outside edge.
Shoulder Length: The size of the shoulder on the bore adapter. When assembled into a bearing, this is the distance from the edge of the bearing to the edge of the bore adapter. Some bore adapters do not have a shoulder length. These are known as "sleeves" because they match the width of the bearing.
Throughbore: Length of the bore, from one edge to the other. The Frontside Offset and Backside offset together equal the length of the throughbore.
- Holiday periods when our warehouse is closed and USPS holidays (please see "Shipping Policies" for an updated list)
- Items that are noted: "Typically ships within 3 business days".
This bore adapter is designed to work with 17mm single-row heavy duty bearings, known as ''6203'' type, and will reduce your inside diameter to 3/8''.
It is made of Powder Metal. Powder metal bore adapters are intentionally designed to be brittle so that if system errors occur, the bore adapter will break to reduce the likelihood of serious damage to your machine.
When installed, the shoulder of the bore adapter will protrude 0.265'' from the bearing to assist in proper alignment in your system.
Direct OEM Replacement for: Ferris 1521879 Power-Draulics: 21034 Regal Power: IDLER BBA3
